package com.lbc.lock;

//  测试生产者消费者问题2：信号灯法，标志位解决
public class TestPC2 {

    public static void main(String[] args) {
        TV tv = new TV();

        new Player(tv).start();
        new Watcher(tv).start();
    }
}

//  生产者-->演员
class Player extends Thread {
    TV tv;
    public Player(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            if (i%2==0) {
                this.tv.play("快乐大本营播放中");
            } else {
                this.tv.play("抖音：记录美好生活");
            }
        }
    }
}

//  消费者-->观众
class Watcher extends Thread{
    TV tv;
    public Watcher(TV tv) {
        this.tv = tv;
    }

    @Override
    public void run() {
        for (int i = 0; i < 20; i++) {
            tv.watch();
        }
    }
}

//  产品-->节目
class TV {
    //  演员表演，观众等待  T
    //  观众观看，演员等待  F
    String voice;  //表演的节目
    boolean flag = true;

    //  表演
    public synchronized void play(String voice) {
        if (!flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("演员表演了："+voice);
        //  通知观众观看
        this.notifyAll();  //  通知唤醒
        this.voice = voice;
        this.flag = !this.flag;
    }

    //  观看
    public synchronized  void watch() {
        if (flag) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("观看了："+voice);
        //  通知演员表演
        this.notifyAll();
        this.flag = !this.flag;
    }

}
